我试图在Windows 64位计算机上安装R 3.2.0中的XMLSchema开发版本（v. 0.8.0）。 不幸的是，发布版本（v. 0.7.0）对我尝试访问的database不起作用。 但是，当我尝试从源安装0.8.0时，我收到以下错误：
> install.packages("XMLSchema", type="source", repos = NULL)
Installing package into ‘C:/Users/Will/Documents/R/win-library/3.2’
(as ‘lib’ is unspecified)
* installing *source* package 'XMLSchema' ...
** R
** inst
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
Error in .mergeMethodsTable(generic, mtable, tt, attach) :
trying to get slot "defined" from an object of a basic class ("list") with no slots
Error: loading failed
Execution halted
ERROR: loading failed
* removing 'C:/Users/Will/Documents/R/win-library/3.2/XMLSchema'
Warning in install.packages :
running command '"C:/PROGRA~1/R/R-32~1.0/bin/x64/R" CMD INSTALL -l "C:\Users\Will\Documents\R\win-library\3.2" "XMLSchema"' had status 1
Warning in install.packages :
installation of package ‘XMLSchema’ had non-zero exit status
任何想法或见解都将不胜感激。 该软件包适用于以前版本的R，也许是兼容性问题？ 感谢。